EP3860067A1 - Équipement utilisateur, et station de base - Google Patents

Équipement utilisateur, et station de base Download PDF

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Publication number
EP3860067A1
EP3860067A1 EP18935523.3A EP18935523A EP3860067A1 EP 3860067 A1 EP3860067 A1 EP 3860067A1 EP 18935523 A EP18935523 A EP 18935523A EP 3860067 A1 EP3860067 A1 EP 3860067A1
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EP
European Patent Office
Prior art keywords
control
mib
section
bwp
downlink
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EP18935523.3A
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German (de)
English (en)
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EP3860067A4 (fr
Inventor
Hideaki Takahashi
Kazuki Takeda
Hiroki Harada
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NTT Docomo Inc
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NTT Docomo Inc
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Publication of EP3860067A1 publication Critical patent/EP3860067A1/fr
Publication of EP3860067A4 publication Critical patent/EP3860067A4/fr
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path

Definitions

  • the present disclosure relates to a user terminal and a base station in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • 3GPP Third Generation Partnership Project
  • Rel. Release 10 to 14
  • 3GPP Rel. 8 and 9 LTE-Advanced
  • SSB synchronization signal block
  • MIB master information block
  • P-BCH physical broadcast channel
  • SSB is a signal block including at least one of a synchronization signal (for example, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) and PBCH, and is also called an SS/PBCH block or the like.
  • a synchronization signal for example, a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • Non Patent Literature 1 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8)", April, 2010
  • CORESET #0 control resource set (CORESET #0, also called a type 0-PDCCH CSS, or the like) for a search space (common search space (CSS)) common to one or more user terminals (user equipment (UE))
  • CRS common search space
  • UE user equipment
  • the CORESET #0 is being considered to be configured based on a parameter in the MIB (for example, pdcch-ConfigSIB1).
  • reception processing for example, at least one of reception, demodulation, decoding, rate matching, or the like
  • reception processing for example, at least one of reception, demodulation, decoding, rate matching, or the like
  • a downlink shared channel for example, PDSCH
  • a band for example, initial downlink bandwidth part (BWP)
  • one of objects of the present disclosure is to provide a user terminal and a base station capable of appropriately controlling the reception processing of the downlink shared channel.
  • a user terminal includes a receiving section that receives downlink control information including a given field indicating a frequency domain resource assigned to a downlink shared channel, and a control section that controls reception of the downlink shared channel based on whether or not a control resource set for a common search space is configured based on a master information block (MIB).
  • MIB master information block
  • reception processing of a downlink shared channel can be appropriately controlled.
  • Future radio communication systems (hereinafter also referred to as NR) use carriers (for example, 100 to 400 MHz) having a wider bandwidth than the carriers (for example, 20 MHz) of existing LTE systems (for example, Rel. 8 to 13).
  • carriers for example, 100 to 400 MHz
  • the carriers for example, 20 MHz
  • existing LTE systems for example, Rel. 8 to 13
  • the carrier is also called a component carrier (CC), a cell, a serving cell, a system bandwidth, or the like. Further, the partial band in the carrier is called, for example, a bandwidth part (BWP) or the like.
  • the BWP may include a BWP for uplink (uplink BWP) and a BWP for downlink (downlink BWP).
  • the UE is configured with one or more BWPs (one or more uplink BWPs and one or more downlink BWPs), and at least one of the configured BWPs may be activated.
  • An activated BWP is also called an active BWP or the like.
  • a BWP for initial access may be configured for the UE.
  • the initial BWP may include at least one of an initial BWP for downlink (initial downlink BWP, initial DL bandwidth part) and an initial BWP for uplink (initial uplink BWP).
  • At least one of detection of a synchronization signal, acquisition of broadcast information (for example, a master information block (MIB)), or establishment of connection by random access may be performed.
  • broadcast information for example, a master information block (MIB)
  • MIB master information block
  • a bandwidth of the initial BWP may be configured based on an index (also called pdcch-ConfigSIB1, RMSI-PDCCH-Config, or the like) in the MIB transmitted via a physical broadcast channel (PBCH, also referred to as P-BCH, or the like).
  • an index also called pdcch-ConfigSIB1, RMSI-PDCCH-Config, or the like
  • PBCH physical broadcast channel
  • Fig. 1 is a diagram illustrating an example of determining the bandwidth of the initial BWP based on the MIB.
  • the MIB may include configuration information (also referred to as pdcch-ConfigSIB1 or RMSI-PDCCH-Config, or the like) regarding PDCCH for system information (for example, SIB1, RMSI, or the like).
  • configuration information also referred to as pdcch-ConfigSIB1 or RMSI-PDCCH-Config, or the like
  • system information for example, SIB1, RMSI, or the like.
  • the parameters in the MIB illustrated in Fig. 1 and the hierarchical structure of the parameters are only examples, and a part of parameters (layers) may be omitted or added.
  • the pdcch-ConfigSIB1 in the MIB may include information used to configure the initial BWP (ControlResourceSetZero, also referred to as a given number of most significant bits (MSB) (for example, 4MSB) or the like).
  • ControlResourceSetZero also referred to as a given number of most significant bits (MSB) (for example, 4MSB) or the like).
  • MSB most significant bits
  • the UE may determine the bandwidth of the initial BWP based on the number of RBs (N CORESET RB ) associated with an index indicated by ControlResourceSetZero in the pdcch-ConfigSIB1.
  • the bandwidth of the initial BWP may be replaced with the number of RBs constituting a given control resource set (CORESET).
  • the CORESET is an assignment candidate area of a physical downlink control channel (for example, a physical downlink control channel (PDCCH)).
  • PDCCH physical downlink control channel
  • One or more search spaces may be configured in the CORESET, and DCI monitoring (blind decoding) by the UE may be performed in the search space.
  • the search space may include a (cell-specific) search space used for monitoring DCI common to one or more UEs (common search space (CSS)) and a UE-specific search space used for monitoring DCI (user-specific search space (USS)) .
  • a (cell-specific) search space used for monitoring DCI common to one or more UEs common search space (CSS)
  • UE-specific search space used for monitoring DCI user-specific search space (USS)
  • the CSS may include a search space used to monitor a (CRC scrambled) DCI with a cyclic redundancy check (CRC) bit scrambled with a given radio network temporary identifier (RNTI) in a given cell.
  • CRC cyclic redundancy check
  • the given RNTI may include, for example, system information-RNTI (SI-RNTI), random access-RNTI (RA-RNTI), temporary cell-RNTI (TC-RNTI), paging-RNTI (P-RNTI), interruption RNTI (INT-RNTI) for DL preemption instruction, slot format indicator RNTI (SFI-RNTI) for slot format instruction, TPC-PUSCH-RNTI for transmit power control (TPC) of physical uplink shared channel (PUSCH), TPC-PUCCH-RNTI for TPC of physical uplink control channel (PUCCH), TPC-SRS-RNTI for TPC of sounding reference signal (SRS), C-RNTI, MCS-C-RNTI, CS-RNTI, and the like.
  • SI-RNTI system information-RNTI
  • RA-RNTI random access-RNTI
  • TC-RNTI temporary cell-RNTI
  • P-RNTI paging-RNTI
  • INT-RNTI interruption RNTI
  • SFI-RNTI slot format indicator RN
  • SI-RNTI system information-RNTI
  • type 0-PDCCH CSS a search space #0, a search space for SIB1, a search space for remaining minimum system information (RMSI), and the like.
  • the given CORESET whose the number of RBs is determined based on the pdcch-ConfigSIB1 in the MIB may be a CORESET for the type 0-PDCCH CSS.
  • the CORESET for CSS as described above is also called a CORESET #0, a CORESET0, a common CORESET, an initial downlink BWP, and the like.
  • the UE can avoid configuring the CORESET #0 based on the pdcch-ConfigSIB1 in the MIB.
  • a cell for NR for example, a secondary cell
  • NSA non-standalone
  • the PBCH (MIB) is broadcast but system information (for example, SIB1, RMSI) is not broadcast, and thus the CORESET #0 does not need to be configured.
  • a specific value determined based on a given parameter in the MIB may indicate that the SIB1 does not exist, and the CORESET #0 does not exist.
  • the specific value is, for example, the value of K SSB , and may be "30" in a frequency range (frequency range (FR)) 1 (frequency band of 6 GHz or less) and "14" in FR2 (frequency band higher than 24 GHz).
  • a given bit of K SSB (for example, 4MSB) is constituted of Ssb-subcarrierOffset, and the remaining bits of K SSB (for example, 1LSB) may be given bits in a PBCH payload.
  • Ssb-subcarrierOffset is a parameter that indicates the frequency domain offset between the SSB and the entire resource block grid in the number of subcarriers.
  • the CORESET #0 is not configured in NR based on the pdcch-ConfigSIB1 in the MIB.
  • the CORESET #0 is not configured based on the pdcch-ConfigSIB1 in the MIB, there is a concern that the UE cannot properly control reception processing of PDSCH (for example, at least one of reception, demodulation, decoding, or rate matching) in the initial downlink BWP.
  • a given field for example, frequency domain resource assignment
  • DCI DL assignment
  • the bandwidth of the initial downlink BWP is also used for bit selection in rate matching (for example, rate matching for low-density parity-check code (LDCP)).
  • rate matching for example, rate matching for low-density parity-check code (LDCP)
  • the bandwidth of the CORESET #0 is used as the bandwidth of these initial downlink BWPs.
  • the CORESET #0 is not configured based on the pdcch-ConfigSIB1 in the MIB, the question is how to determine the bandwidth of the initial downlink BWP.
  • the present inventors have considered a method for appropriately determining the bandwidth of the initial downlink BWP used to determine at least one of the number of bits in a given field that specifies a frequency domain resource assigned to PDSCH in the initial downlink BWP, or rate matching of the PDSCH, and have devised the present invention.
  • the CORESET #0 assumes a CORESET for the type 0-PDCCH CSS, but is not limited to this.
  • the UE may determine the number of bits in the given field that indicates the frequency domain resource assigned to PDSCH in the DCI based on whether or not the CORESET #0 (control resource set for the common search space) is configured based on the MIB.
  • the given field in the DCI will be called a frequency domain resource assignment field (frequency domain resource assignment), but the name of the given field is not limited to this.
  • the UE may determine the number of bits of the frequency domain resource assignment field in the DCI based on the size of the CORESET #0 when the CORESET #0 is configured based on the MIB (for example, the pdcch-ConfigSIB1 in the MIB).
  • the size of the CORESET #0 may be determined based on a given bit (for example, 4MSB, ControlResourceSetZero) in the pdcch-ConfigSIB1 in the MIB, as described in Fig. 1 .
  • the UE may determine the number of bits in the frequency domain resource assignment field in the DCI based on the size of the initial downlink BWP when the CORESET #0 is not configured based on the MIB (for example, the pdcch-ConfigSIB1 in the MIB).
  • the size of the initial downlink BWP may be given by a higher layer parameter (for example, a parameter to be RRC-signaled).
  • the higher layer parameter may be specific information (for example, locationAndBandwidth) in information regarding the initial downlink BWP (for example, BWP-DownlinkCommon for initialDownlinkBWP).
  • the information regarding the initial downlink BWP may be included in an RRC message (for example, RRC reconfiguration message) or SIB1.
  • Fig. 2 is a diagram illustrating an example of information regarding the initial downlink BWP.
  • the information regarding the initial downlink BWP may include information (location/bandwidth information, for example, locationAndBandwidth) used to determine at least one of the location and bandwidth (location/bandwidth) of the frequency domain of the initial downlink BWP.
  • locationAndBandwidth may be constituted of a given number of bits (for example, 15 bits).
  • the UE may determine the bandwidth (number of RBs) of the initial downlink BWP based on at least one bit of the locationAndBandwidth. For example, the UE may determine the number of RBs associated with an index indicated by at least one bit of the locationAndBandwidth as the bandwidth of the initial downlink BWP in a table that associates at least the number of RBs with a given index.
  • cell-specific parameter configuration information may include information regarding the initial downlink BWP (for example, initialDownlinkBWP).
  • initialDownlinkBWP For initialDownlinkBWP, a cell-specific common parameter (BWP-DownlinkCommon) may be provided.
  • the BWP-DownlinkCommon may include the above-described locationAndBandwidth and the like.
  • the UE may determine the location/bandwidth of the initial downlink BWP based on the locationAndBandwidth in the BWP-DownlinkCommon provided for the initialDownlinkBWP.
  • Fig. 2 may be included in an RRC reconfiguration message.
  • the hierarchical structure of parameters illustrated in Fig. 2 is only an example, and is not limited to the one illustrated in the diagram.
  • the information regarding the initial downlink BWP (for example, the BWP-DownlinkCommon given for the initialDownlinkBWP) is included in the ServingCellConfigCommon, but may be included in any information item (information element (IE)) in any layer.
  • the information regarding the initial downlink BWP may be included in SIB1 (for example, DownlinkConfigCommonSIB in ServingCellConfigCommonSIB in SIB1).
  • the location/bandwidth information (for example, the locationAndBandwidth) of the initial downlink BWP is included in the BWP-DownlinkCommon given for the initialDownlinkBWP, but may be included in any IE in any layer.
  • Fig. 3 is a diagram illustrating an example of determining the number of bits of the frequency domain resource assignment field in the DL assignment according to the first aspect.
  • the DL assignment may include at least one of DCI format 1_0 and DCI format 1_1.
  • Fig. 3 illustrates DCI format 1_0 as an example of DL assignment, it may be any DCI used for PDSCH scheduling.
  • the DCI format 1_0 in Fig. 3 may be CRC-scrambled with a given identifier.
  • the given identifier is only required to be at least one of, for example, cell-radio network temporary identifier (C-RNTI), paging-RNTI (P-RNTI), system information-RNTI (SI-RNTI), random access-RNTI (RA-RNTI), or temporary cell-RNTI (TC-RNTI).
  • C-RNTI cell-radio network temporary identifier
  • P-RNTI paging-RNTI
  • SI-RNTI system information-RNTI
  • RA-RNTI random access-RNTI
  • TC-RNTI temporary cell-RNTI
  • a frequency resource assigned to PDSCH in a bandwidth N DL,BWP RB of the initial downlink BWP is specified by the frequency domain resource assignment field of the DCI format 1_0.
  • the assignment of the frequency resource to PDSCH in Fig. 3 is merely an example, and discontinuous frequency resources may be assigned to PDSCH. Further, the assignment unit of the frequency resource may be an RB or may be a resource block group (RB) including one or more RBs.
  • RB resource block group
  • the number of bits of the frequency domain resource assignment field may be determined based on the bandwidth N DL,BWP RB of the initial downlink BWP.
  • the number of bits is determined based on equation (1) below. ⁇ log 2 N RB DL , BWP N RB DL , BWP + 1 / 2 ⁇
  • N DL,BWP RB in equation (1) may have the size of the above CORESET #0.
  • the size of the CORESET #0 may be determined based on a given bit (for example, 4MSB, ControlResourceSetZero) in the pdcch-ConfigSIB1 in the MIB, as described in Fig. 1 .
  • N DL,BWP RB in equation (1) may be the size of the initial downlink BWP (for example, the bandwidth given by the locationAndBandwidth of the above BWP-DownlinkCommon). Note that the bandwidth determination based on at least one bit constituting the locationAndBandwidth is as described above.
  • equation (1) above is merely an example, and the number of bits in the frequency domain resource assignment field may be determined by using an equation other than equation (1) above.
  • the number of bits in the frequency domain resource assignment field may be determined based on equation (2) below. [Equation 2] ⁇ log 2 N RB DL , BWP N RB DL , BWP + 1 / 2 ⁇ + 19
  • the number of bits of the frequency domain resource assignment field in the DCI is determined based on whether or not the CORSET #0 is configured based on the MIB, and thus the UE can properly control reception of PDSCH assigned by the initial BWP by the DCI.
  • the UE may control bit selection in rate matching of PDSCH based on whether or not the CORESET #0 (control resource set for the common search space) is configured based on the MIB.
  • the CORESET #0 control resource set for the common search space
  • the UE may control the bit selection in rate matching of PDSCH based on the size of the CORESET #0 when the CORESET #0 is configured based on the MIB (for example, pdcch-ConfigSIB1 in the MIB).
  • the size of the CORESET #0 may be determined based on a given bit (for example, 4MSB, ControlResourceSetZero) in the pdcch-ConfigSIB1 in the MIB, as described in Fig. 1 .
  • the UE may control the bit selection in rate matching of PDSCH based on the size of the initial downlink BWP when the CORESET #0 is not configured based on the MIB (for example, pdcch-ConfigSIB1 in the MIB).
  • the determination of the size of the initial downlink BWP is as described in the first aspect (for example, Fig. 2 ).
  • bit selection in rate matching may be to select a given number of bits (for example, consecutive bits) that matches the resource assigned for transmission (for example, the number of resource elements (REs) available in one or more RBs assigned to PDSCH or PUSCH) from a circular buffer having a given length in which a bit sequence after encoding is stored.
  • the resource assigned for transmission for example, the number of resource elements (REs) available in one or more RBs assigned to PDSCH or PUSCH
  • rate matching may be, for example, rate matching for LDCP.
  • Fig. 4 is a diagram illustrating an example of control of bit selection in rate matching according to the second aspect. Note that the bit selection in rate matching illustrated in Fig. 4 may also be applied to the rate matching of data (also referred to as a transport block, code block, or the like) transmitted by PDSCH assigned to the initial downlink BWP.
  • data also referred to as a transport block, code block, or the like
  • a bit sequence (for example, output bits from an LDCP encoder) d 0 , d 1 , ... , d N-1 of the number of bits N after encoding are written to a circular buffer having a given length.
  • the number of bits E retrieved from the circular buffer may be determined based on the bandwidth of the initial downlink BWP.
  • DL-SCH downlink shared channel
  • the number of bits E taken out of the circular buffer in Fig. 4 may be determined based on the size of the CORESET #0.
  • the number of bits E retrieved from the circular buffer in Fig. 4 may be determined based on the bandwidth given by the locationAndBandwidth of the BWP-DownlinkCommon for the initialDownlinkBWP.
  • the number of bits E retrieved from the circular buffer in the rate matching of PDSCH is determined based on whether or not the CORSET #0 is configured based on the MIB, and thus the UE can properly control the rate matching of PDSCH assigned to the initial BWP.
  • radio communication system communication is performed using one or a combination of the radio communication methods according to the embodiments of the present disclosure.
  • FIG. 5 is a diagram illustrating an example of a schematic configuration of a radio communication system according to one embodiment.
  • a radio communication system 1 may be a system that implements communication using long term evolution (LTE), 5th generation mobile communication system new radio (5G NR), and the like specified by the Third Generation Partnership Project (3GPP).
  • LTE long term evolution
  • 5G NR 5th generation mobile communication system new radio
  • 3GPP Third Generation Partnership Project
  • the radio communication system 1 may support dual connectivity (multi-RAT dual connectivity (MR-DC)) between a plurality of radio access technologies (RATs).
  • MR-DC may include dual connectivity between LTE (evolved universal terrestrial radio access (E-UTRA)) and NR (E-UTRA-NR dual connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA dual connectivity (NE-DC)), and the like.
  • LTE evolved universal terrestrial radio access
  • EN-DC E-UTRA-NR dual connectivity
  • NE-DC NR-E-UTRA dual connectivity
  • an LTE (E-UTRA) base station eNB
  • MN master node
  • gNB NR base station
  • SN secondary node
  • an NR base station (gNB) is MN
  • an LTE (E-UTRA) base station (eNB) is SN.
  • the radio communication system 1 may support dual connectivity between a plurality of base stations in identical RAT (for example, dual connectivity in which both MN and SN are NR base stations (gNB) (NR-NR dual connectivity (NN-DC)).
  • a plurality of base stations in identical RAT for example, dual connectivity in which both MN and SN are NR base stations (gNB) (NR-NR dual connectivity (NN-DC)).
  • the radio communication system 1 may include a base station 11 that forms a macro cell C1 with a relatively wide coverage, and base stations 12 (12a to 12c) that are disposed within the macro cell C1 and that form small cells C2 narrower than the macro cell C1.
  • a user terminal 20 may be located in at least one cell.
  • the arrangement, number, and the like of cells and the user terminals 20 are not limited to the aspects illustrated in the drawings.
  • the base stations 11 and 12 will be collectively referred to as "base stations 10", unless these are distinguished from each other.
  • the user terminal 20 may be connected to at least one of the plurality of base stations 10.
  • the user terminal 20 may use at least one of carrier aggregation and dual connectivity (DC) using a plurality of component carriers (CC).
  • DC carrier aggregation and dual connectivity
  • CC component carriers
  • Each CC may be included in at least one of a frequency range 1 (FR1) and a frequency range 2 (FR2).
  • the macro cell C1 may be included in FR1, and the small cell C2 may be included in FR2.
  • FR1 may be a frequency band of 6 GHz or less (sub-6 GHz)
  • FR2 may be a frequency band higher than 24 GHz (above-24 GHz).
  • the frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and for example, FR1 may be a frequency band higher than FR2.
  • the user terminal 20 may perform communication in each CC using at least one of time division duplex (TDD) and frequency division duplex (FDD).
  • TDD time division duplex
  • FDD frequency division duplex
  • the plurality of base stations 10 may be connected by wire (for example, an optical fiber, an X2 interface, or the like in compliance with common public radio interface (CPRI)) or by radio (for example, NR communication).
  • wire for example, an optical fiber, an X2 interface, or the like in compliance with common public radio interface (CPRI)
  • radio for example, NR communication
  • IAB integrated access backhaul
  • relay relay station
  • a base station 10 may be connected to a core network 30 via another base station 10 or directly.
  • the core network 30 may include, for example, at least one of evolved packet core (EPC), 5G core network (5GCN), next generation core (NGC), and the like.
  • EPC evolved packet core
  • 5GCN 5G core network
  • NGC next generation core
  • the user terminal 20 may correspond to at least one of communication methods such as LTE, LTE-A, and 5G.
  • a radio access method based on orthogonal frequency division multiplexing may be used.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM cyclic prefix OFDM
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • the radio access method may be called a waveform.
  • another radio access method for example, another single carrier transmission method or another multi-carrier transmission method
  • a physical downlink shared channel shared by each user terminal 20, a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), or the like may be used.
  • PBCH physical broadcast channel
  • PDCCH physical downlink control channel
  • a physical uplink shared channel (PUSCH) shared by each user terminals 20, a physical uplink control channel (PUCCH), a physical random access channel (PRACH), or the like may be used.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • PDSCH User data, higher layer control information, a system information block (SIB), and the like are transmitted by PDSCH.
  • PDSCH User data, higher layer control information, and the like may be transmitted by PUSCH.
  • a master information block (MIB) may be transmitted by PBCH.
  • Lower layer control information may be transmitted by PDCCH.
  • the lower layer control information may include, for example, downlink control information (DCI) including scheduling information of at least one of PDSCH and PUSCH.
  • DCI downlink control information
  • DCI that schedules PDSCH may be called DL assignment, DL DCI, or the like
  • DCI that schedules PUSCH may be called UL grant, UL DCI, or the like
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (CORESET) and a search space may be used to detect PDCCH.
  • the CORESET corresponds to a resource that searches for DCI.
  • the search space corresponds to a search area and a search method for PDCCH candidates.
  • One CORESET may be associated with one or more search spaces.
  • the UE may monitor CORESET associated with a certain search space based on search space configuration.
  • One SS may correspond to a PDCCH candidate corresponding to one or more aggregation levels.
  • One or more search spaces may be called a search space set. Note that “search space”, “search space set”, “search space configuration”, “search space set configuration”, “CORESET”, “CORESET configuration”, and the like in the present disclosure may be replaced with each other.
  • CSI channel state information
  • delivery confirmation information for example, hybrid automatic repeat request (HARQ-ACK), which may be called ACK/NACK or the like
  • SR scheduling request
  • PRACH a random access preamble for establishing a connection with a cell may be transmitted.
  • downlink, uplink, and the like may be expressed without “link”. Further, various channels may be expressed without adding "physical" at the beginning thereof.
  • a synchronization signal (SS), a downlink reference signal (DL-RS), and the like may be transmitted.
  • a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), and the like may be transmitted as DL-RS.
  • the synchronization signal may be, for example, at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
  • a signal block including SS (PSS or SSS) and PBCH (and DMRS for PBCH) may be called an SS/PBCH block, an SSB (SS Block), and the like. Note that SS, SSB, or the like may also be called a reference signal.
  • a sounding reference signal (SRS), a demodulation reference signal (DMRS), and the like may be transmitted as an uplink reference signal (UL-RS).
  • SRS sounding reference signal
  • DMRS demodulation reference signal
  • UL-RS uplink reference signal
  • UE-specific reference signal user terminal-specific reference signal
  • Fig. 6 is a diagram illustrating an example of a configuration of a base station according to one embodiment.
  • the base station 10 includes a control section 110, a transmitting/receiving section 120, a transmission/reception antenna 130, and a transmission line interface 140. Note that one or more of the control sections 110, one or more of the transmitting/receiving sections 120, one or more of the transmission/reception antennas 130, and one or more of the transmission line interfaces 140 may be included.
  • the control section 110 controls the entire base station 10.
  • the control section 110 can be constituted by a controller, a control circuit, or the like, which is described based on common recognition in the technical field to which the present disclosure relates.
  • the control section 110 may control signal generation, scheduling (for example, resource assignment or mapping), and the like.
  • the control section 110 may control transmission/reception, measurement, and the like using the transmitting/receiving section 120, the transmission/reception antenna 130, and the transmission line interface 140.
  • the control section 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and may transfer the data, the control information, the sequence, and the like to the transmitting/receiving section 120.
  • the control section 110 may perform call processing (such as configuration or releasing) of a communication channel, management of the state of the base station 10, management of a radio resource, and the like.
  • the transmitting/receiving section 120 may include a baseband section 121, a radio frequency (RF) section 122, and a measurement section 123.
  • the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212.
  • the transmitting/receiving section 120 can be constituted by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission/reception circuit, and the like, which are described based on common recognition in the technical field to which the present disclosure relates.
  • the transmitting/receiving section 120 may be constituted as an integrated transmitting/receiving section, or may be constituted by a transmitting section and a receiving section.
  • the transmitting section may be constituted by the transmission processing section 1211 and the RF section 122.
  • the receiving section may be constituted by the reception processing section 1212, the RF section 122, and the measurement section 123.
  • the transmission/reception antenna 130 can be constituted by an antenna described based on common recognition in the technical field to which the present disclosure relates, for example, an array antenna or the like.
  • the transmitting/receiving section 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving section 120 may receive the above-described uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving section 120 may form at least one of a transmission beam and a reception beam by using digital beam forming (for example, precoding), analog beam forming (for example, phase rotation), and the like.
  • digital beam forming for example, precoding
  • analog beam forming for example, phase rotation
  • the transmitting/receiving section 120 may perform packet data convergence protocol (PDCP) layer processing, radio link control (RLC) layer processing (for example, RLC retransmission control), medium access control (MAC) layer processing (for example, HARQ retransmission control), and the like, for example, on data, control information, or the like acquired from the control section 110 to generate a bit string to be transmitted.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • HARQ retransmission control for example, HARQ retransmission control
  • the transmitting/receiving section 120 may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering processing, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, or digital-analog transform on the bit string to be transmitted, and may output a baseband signal.
  • transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering processing, discrete Fourier transform (DFT) processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, or digital-analog transform
  • the transmitting/receiving section 120 may perform modulation to a radio frequency band, filtering processing, amplification, and the like on the baseband signal, and may transmit a signal in the radio frequency band via the transmission/reception antenna 130.
  • the transmitting/receiving section 120 may perform amplification, filtering processing, demodulation to a baseband signal, and the like on the signal in the radio frequency band received by the transmission/reception antenna 130.
  • the transmitting/receiving section 120 may apply reception processing such as analog-digital transform, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (if necessary), filtering processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, or PDCP layer processing on the acquired baseband signal to acquire user data and the like.
  • reception processing such as analog-digital transform, fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT) processing (if necessary), filtering processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, or PDCP layer processing on the acquired baseband signal to acquire user data and the like.
  • the transmitting/receiving section 120 may perform measurement on the received signal.
  • the measurement section 123 may perform radio resource management (RRM) measurement, channel state information (CSI) measurement, and the like based on the received signal.
  • the measurement section 123 may measure received power (for example, reference signal received power (RSRP)), received quality (for example, reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR), or signal to noise ratio (SNR)), signal strength (for example, received signal strength indicator (RSSI)), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control section 110.
  • the transmission line interface 140 may transmit/receive a signal (backhaul signaling) to and from an apparatus included in the core network 30, other base stations 10, and the like, and may perform acquisition, transmission, and the like of user data (user plane data), control plane data, and the like for the user terminal 20.
  • a signal backhaul signaling
  • the transmitting section and the receiving section of the base station 10 in the present disclosure may be constituted by at least one of the transmitting/receiving section 120, the transmission/reception antenna 130, and the transmission line interface 140.
  • the transmitting/receiving section 120 may transmit at least one of the master information block (MIB), the system information block (SIB) 1, or the RRC reconfiguration message in the cell.
  • MIB master information block
  • SIB system information block
  • RRC reconfiguration message the RRC reconfiguration message
  • the transmitting/receiving section 120 transmits an uplink signal (for example, an uplink control channel, an uplink shared channel, DMRS, or the like). Further, the transmitting/receiving section 120 receives a downlink signal (for example, a downlink control channel, a downlink shared channel, DMRS, downlink control information, a higher layer parameter, or the like). Specifically, the transmitting/receiving section 120 may transmit downlink control information including a given field indicating a frequency domain resource assigned to the downlink shared channel.
  • the control section 110 may control reception of the downlink shared channel based on whether or not the control resource set for the common search space is configured based on the master information block (MIB).
  • MIB master information block
  • control section 110 may determine the number of bits in the given field based on the size of the control resource set (first aspect).
  • control section 110 may determine the number of bits in the given field based on the size of the band for initial access determined based on the higher layer parameters (first aspect).
  • control section 110 may control the bit selection in rate matching of the downlink shared channel based on the size of the control resource set (second aspect).
  • control section 110 may control the bit selection in rate matching of the downlink shared channel based on the size of the band for initial access determined based on the higher layer parameters (second aspect).
  • Fig. 7 is a diagram illustrating an example of a configuration of a user terminal according to one embodiment.
  • the user terminal 20 includes a control section 210, a transmitting/receiving section 220, and a transmission/reception antenna 230. Note that one or more of the control sections 210, one or more of the transmitting/receiving sections 220, and one or more of the transmission/reception antennas 230 may be included.
  • the control section 210 controls the entire user terminal 20.
  • the control section 210 can be constituted by a controller, a control circuit, or the like, which is described based on common recognition in the technical field to which the present disclosure relates.
  • the control section 210 may control signal generation, mapping, and the like.
  • the control section 210 may control transmission/reception, measurement, and the like using the transmitting/receiving section 220 and the transmission/reception antenna 230.
  • the control section 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and may transfer the data, the control information, the sequence, and the like to the transmitting/receiving section 220.
  • the transmitting/receiving section 220 may include a baseband section 221, an RF section 222, and a measurement section 223.
  • the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212.
  • the transmitting/receiving section 220 can be constituted by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission/reception circuit, and the like, which are described based on common recognition in the technical field to which the present disclosure relates.
  • the transmitting/receiving section 220 may be constituted as an integrated transmitting/receiving section, or may be constituted by a transmitting section and a receiving section.
  • the transmitting section may be constituted by the transmission processing section 2211 and the RF section 222.
  • the receiving section may be constituted by the reception processing section 2212, the RF section 222, and the measurement section 223.
  • the transmission/reception antenna 230 can be constituted by an antenna described based on common recognition in the technical field to which the present disclosure relates, for example, an array antenna or the like.
  • the transmitting/receiving section 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving section 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving section 220 may form at least one of a transmission beam and a reception beam by using digital beam forming (for example, precoding), analog beam forming (for example, phase rotation), and the like.
  • digital beam forming for example, precoding
  • analog beam forming for example, phase rotation
  • the transmitting/receiving section 220 may perform PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, HARQ retransmission control), and the like, for example, on data, control information, or the like acquired from the control section 210 to generate a bit string to be transmitted.
  • RLC layer processing for example, RLC retransmission control
  • MAC layer processing for example, HARQ retransmission control
  • the transmitting/receiving section 220 may perform transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering processing, DFT processing (if necessary), IFFT processing, precoding, or digital-analog transform on a bit string to be transmitted, and may output a baseband signal.
  • transmission processing such as channel encoding (which may include error correction encoding), modulation, mapping, filtering processing, DFT processing (if necessary), IFFT processing, precoding, or digital-analog transform on a bit string to be transmitted, and may output a baseband signal.
  • whether or not to apply DFT processing may be determined based on configuration of transform precoding.
  • the transmitting/receiving section 220 may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform.
  • the transmitting/receiving section 220 does not have to perform DFT processing as the transmission processing.
  • the transmitting/receiving section 220 may perform modulation to a radio frequency band, filtering processing, amplification, and the like on the baseband signal, and may transmit a signal in the radio frequency band via the transmission/reception antenna 230.
  • the transmitting/receiving section 220 may perform amplification, filtering processing, demodulation to a baseband signal, and the like on the signal in the radio frequency band received by the transmission/reception antenna 230.
  • the transmitting/receiving section 220 may acquire user data and the like by applying reception processing such as analog-digital transform, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, or PDCP layer processing on the acquired baseband signal.
  • reception processing such as analog-digital transform, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, or PDCP layer processing on the acquired baseband signal.
  • the transmitting/receiving section 220 may perform measurement on the received signal.
  • the measurement section 223 may perform RRM measurement, CSI measurement, and the like based on the received signal.
  • the measurement section 223 may measure received power (for example, RSRP), received quality (for example, RSRQ, SINR, or SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
  • the measurement result may be output to the control section 210.
  • the transmitting section and the receiving section of the user terminal 20 in the present disclosure may be constituted by at least one of the transmitting/receiving section 220, the transmission/reception antenna 230, and the transmission line interface 240.
  • the transmitting/receiving section 220 may receive at least one of the master information block (MIB), the system information block (SIB) 1, or the RRC reconfiguration message in the cell.
  • MIB master information block
  • SIB system information block
  • RRC reconfiguration message the RRC reconfiguration message
  • the transmitting/receiving section 220 transmits an uplink signal (for example, an uplink control channel, an uplink shared channel, DMRS, or the like). Further, the transmitting/receiving section 220 receives a downlink signal (for example, a downlink control channel, a downlink shared channel, DMRS, downlink control information, a higher layer parameter, or the like). Specifically, the transmitting/receiving section 220 may transmit downlink control information including a given field indicating a frequency domain resource assigned to the downlink shared channel.
  • the control section 210 may control reception of the downlink shared channel based on whether or not the control resource set for the common search space is configured based on the master information block (MIB).
  • MIB master information block
  • control section 210 may determine the number of bits in the given field based on the size of the control resource set (first aspect).
  • control section 210 may determine the number of bits in the given field based on the size of the band for initial access determined based on the higher layer parameters (first aspect).
  • control section 210 may control the bit selection in rate matching of the downlink shared channel based on the size of the control resource set (second aspect).
  • control section 210 may control the bit selection in rate matching of the downlink shared channel based on the size of the band for initial access determined based on the higher layer parameters (second aspect).
  • each functional block may be achieved by a single device physically or logically aggregated, or may be achieved by directly or indirectly connecting two or more physically or logically separate devices (using wires, radio, or the like, for example) and using these plural devices.
  • the functional block may be achieved by combining the one device or the plurality of devices with software.
  • the functions include, but are not limited to, judging, determination, decision, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, choosing, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, and so on.
  • a functional block (configuration unit) that causes transmission to function may be called a transmitting section (transmitting unit), a transmitter, or the like.
  • the implementation method is not particularly limited.
  • the base station, the user terminal, and so on may function as a computer that executes the processing of the radio communication method of the present disclosure.
  • Fig. 8 is a diagram illustrating an example of hardware configurations of the base station and the user terminal according to one embodiment.
  • the above-described base station 10 and user terminal 20 may be formed as a computer apparatus that includes a processor 1001, a memory 1002, a storage 1003, a communication apparatus 1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, and so on.
  • the terms such as an apparatus, a circuit, a device, a section, or a unit can be replaced with each other.
  • the hardware configuration of the base station 10 and the user terminal 20 may be designed to include one or more of the apparatuses illustrated in the drawings, or may be designed not to include some apparatuses.
  • processor 1001 may be implemented with one or more chips.
  • Each function of the base station 10 and the user terminal 20 is implemented by, for example, reading predetermined software (program) into hardware such as the processor 1001 and the memory 1002, and by controlling the operation in the processor 1001, the communication in the communication apparatus 1004, and at least one of the reading or writing of data in the memory 1002 and the storage 1003.
  • predetermined software program
  • the processor 1001 controls the whole computer by, for example, running an operating system.
  • the processor 1001 may be constituted by a central processing unit (CPU) including an interface with peripheral equipment, a control apparatus, an operation apparatus, a register, and the like.
  • CPU central processing unit
  • control section 110 210
  • transmitting/receiving section 120 220
  • the like may be implemented by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, data, and so on from at least one of the storage 1003 or the communication apparatus 1004 into the memory 1002, and executes various processing according to these.
  • programs program codes
  • software modules software modules
  • data data
  • the control section 110 may be implemented by a control program that is stored in the memory 1002 and operates in the processor 1001, and another functional block may be implemented similarly.
  • the memory 1002 is a computer-readable recording medium, and may be constituted of, for example, at least one of a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or other appropriate storage media.
  • the memory 1002 may be called a "register”, a “cache”, a “main memory (primary storage apparatus)” and so on.
  • the memory 1002 can store a program (program code), a software module, and the like, which are executable for implementing the radio communication method according to one embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, and may be constituted of, for example, at least one of a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disc (compact disc ROM (CD-ROM) and the like), a digital versatile disc, a Blu-ray (registered trademark) disc), a removable disk, a hard disk drive, a smart card, a flash memory device (for example, card, stick, and key drive), a magnetic stripe, a database, a server, or other appropriate storage media.
  • the storage 1003 may be called an "auxiliary storage apparatus".
  • the communication apparatus 1004 is hardware (transmitting/receiving device) for performing inter-computer communication via at least one of a wired network or a wireless network, and may be referred to as, for example, "network device”, “network controller”, “network card”, “communication module”, and the like.
  • the communication apparatus 1004 may include a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to implement, for example, at least one of frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmitting/receiving section 120 (220), the transmission/reception antenna 130 (230), and the like described above may be implemented by the communication apparatus 1004.
  • the transmitting/receiving section 120 (220) may be implemented by physically or logically separating the transmitting section 120a (220a) and the receiving section 120b (220b) from each other.
  • the input apparatus 1005 is an input device for receiving input from the outside (for example, keyboard, mouse, microphone, switch, button, sensor, and the like).
  • the output apparatus 1006 is an output device that performs output to the outside (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, and so on). Note that the input apparatus 1005 and the output apparatus 1006 may have an integrated configuration (for example, touch panel).
  • bus 1007 is connected by these pieces of apparatuses, including the processor 1001, the memory 1002, and the like, so as to communicate information.
  • the bus 1007 may be configured with a single bus, or may be configured with buses different between the apparatuses.
  • the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), and so on, and part or all of the functional blocks may be implemented by the hardware.
  • the processor 1001 may be implemented with at least one of these pieces of hardware.
  • a channel, a symbol, and a signal may be replaced with each other.
  • the signal may be a message.
  • a reference signal can be abbreviated as an "RS”, and may be called a “pilot”, a “pilot signal” and so on, depending on which standard applies.
  • a component carrier CC may be called a "cell”, “frequency carrier”, “carrier frequency”, or the like.
  • a radio frame may be formed with one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting a radio frame may be called a "subframe".
  • a subframe may be formed with one or multiple slots in the time domain.
  • a subframe may be a fixed time duration (for example, 1 ms) that is not dependent on numerology.
  • the numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • the numerology may indicate at least one of subcarrier spacing (SCS), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), the number of symbols per TTI, a radio frame structure, specific filtering processing to be performed by a transceiver in the frequency domain, specific windowing processing to be performed by a transceiver in the time domain, and so on.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • a slot may be formed with one or more symbols in the time domain (orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, or the like). Also, a slot may be a time unit based on numerology.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA single carrier frequency division multiple access
  • the slot may include a plurality of mini slots. Each mini slot may be formed with one or more symbols in the time domain. Also, a mini slot may be called a "subslot". Each mini slot may be formed with fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in a time unit larger than a mini slot may be called PDSCH (PUSCH) mapping type A.
  • a PDSCH (or PUSCH) transmitted using a mini slot may be called "PDSCH (PUSCH) mapping type B".
  • a radio frame, a subframe, a slot, a mini slot and a symbol all represent the time unit in signal communication.
  • a radio frame, a subframe, a slot, a mini slot, and a symbol may be each called by other applicable names. Note that time units such as a frame, a subframe, a slot, a mini slot, and a symbol in the present disclosure may be replaced with each other.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one mini slot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in the existing LTE, may be a period shorter than 1 ms (for example, one to thirteen symbols), or may be a period longer than 1 ms.
  • the unit to represent the TTI may be called a "slot", a "mini slot” and so on, instead of a "subframe".
  • a TTI refers to the minimum time unit of scheduling in radio communication, for example.
  • the base station schedules the radio resources (such as the frequency bandwidth and transmission power that can be used in each user terminal) to assign to each user terminal in TTI units.
  • the definition of TTIs is not limited to this.
  • the TTI may be the transmission time unit of channel-encoded data packets (transport blocks), code blocks, codewords and so on, or may be the unit of processing in scheduling, link adaptation and so on. Note that when TTI is given, a time interval (for example, the number of symbols) in which the transport blocks, the code blocks, the codewords, and the like are actually mapped may be shorter than TTI.
  • one or more TTIs may be the minimum time unit of scheduling.
  • the number of slots (the number of mini slots) to constitute this minimum time unit of scheduling may be controlled.
  • a TTI having a period of 1 ms may be called a usual TTI (TTI in 3GPP Rel. 8 to 12), a normal TTI, a long TTI, a usual subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTI that is shorter than the usual TTI may be called a "shortened TTI", “short TTI”, “partial TTI” (or “fractional TTI"), "shortened subframe”, “short subframe”, “mini slot”, “sub-slot”, “slot”, or the like.
  • a long TTI for example, a normal TTI, a subframe, or the like
  • a short TTI for example, a shortened TTI or the like
  • a TTI duration less than the TTI duration of a long TTI and not less than 1 ms.
  • a resource block is the unit of resource assignment in the time domain and the frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the numerology, and may be 12, for example.
  • the number of subcarriers included in the RB may be determined based on numerology.
  • an RB may include one or more symbols in the time domain, and may be one slot, one mini slot, one subframe, or one TTI in length.
  • One TTI, one subframe, and the like each may be formed with one or more resource blocks.
  • one or more RBs may be called a “physical resource block (PRB (Physical RB))", a “sub-carrier group (SCG)”, a “resource element group (REG)”, a “PRB pair”, an “RB pair” and so on.
  • PRB Physical resource block
  • SCG sub-carrier group
  • REG resource element group
  • a resource block may be constituted of one or more resource elements (REs).
  • REs resource elements
  • one RE may be a radio resource field of one subcarrier and one symbol.
  • the bandwidth part (which may be called a partial bandwidth and the like) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier.
  • the common RB may be specified by the index of the RB based on a common reference point of the carrier.
  • the PRB may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • one or more BWPs may be configured within one carrier.
  • At least one of the configured BWPs may be active, and the UE does not need to assume to transmit or receive a predetermined signal/channel outside the active BWP.
  • “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.
  • radio frames, subframes, slots, mini slots, symbols and so on described above are merely examples.
  • configurations pertaining to the number of subframes included in a radio frame, the number of slots included in a subframe or radio frame, the number of mini slots included in a slot, the number of symbols and RBs included in a slot or a mini slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the length of cyclic prefixes (CPs) and so on can be variously changed.
  • the information, parameters, and the like described in the present disclosure may be represented in absolute values, represented in relative values with respect to given values, or represented using other corresponding information.
  • a radio resource may be instructed by a predetermined index.
  • the information, signals, and the like described in the present disclosure may be represented by using a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, and so on that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination of these.
  • information, signals, and the like can be output at least either from higher layers to lower layers, or from lower layers to higher layers.
  • Information, signals, and so on may be input and output via a plurality of network nodes.
  • the information, signals, and so on that are input and/or output may be stored in a specific location (for example, in a memory), or may be managed in a control table.
  • the information, signals, and so on to be input and/or output can be overwritten, updated, or appended.
  • the information, signals, and so on that are output may be deleted.
  • the information, signals, and so on that are input may be transmitted to another apparatus.
  • notification of information is by no means limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods.
  • notification of information in the present disclosure may be performed by using physical layer signaling (for example, downlink control information (DCI), uplink control information (UCI), higher layer signaling (for example, radio resource control (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), or the like), medium access control (MAC) signaling, another signal, or a combination thereof.
  • DCI downlink control information
  • UCI uplink control information
  • RRC radio resource control
  • MIB master information block
  • SIB system information block
  • MAC medium access control
  • L1/L2 Layer 1/Layer 2
  • L1 control information L1 control signal
  • RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, and the like.
  • MAC signaling may be reported using, for example, MAC control elements (MAC CEs (Control Elements)).
  • reporting of predetermined information does not necessarily have to be sent explicitly, and may be sent implicitly (for example, by not reporting this piece of information, or by reporting another piece of information).
  • Decisions may be made in values represented by one bit (0 or 1), may be made in Boolean values that represent true or false, or may be made by comparing numerical values (for example, comparison with a predetermined value).
  • Software whether called “software”, “firmware”, “middleware”, “microcode”, or “hardware description language”, or called by other names, should be interpreted broadly, to mean instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and the like.
  • software, commands, information, and so on may be transmitted and received via communication media.
  • communication media For example, when software is transmitted from a website, a server, or other remote sources by using at least one of wired technologies (coaxial cables, optical fiber cables, twisted-pair cables, digital subscriber lines (DSLs), and the like) or wireless technologies (infrared radiation, microwaves, and the like), at least one of these wired technologies and wireless technologies is also included in the definition of communication media.
  • wired technologies coaxial cables, optical fiber cables, twisted-pair cables, digital subscriber lines (DSLs), and the like
  • wireless technologies infrared radiation, microwaves, and the like
  • the terms “system” and “network” used in the present disclosure may be used interchangeably.
  • the “network” may mean an apparatus (for example, a base station) included in the network.
  • precoding means such as “precoding”, “precoder”, “weight (precoding weight)”, “quasi-Co-Location (QCL)", “transmission configuration indication state (TCI state)", “spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, “antenna port”, “antenna port group”, “layer”, “number of layers”, “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, and “panel” may be used interchangeably.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • access point TP
  • RP reception point
  • TRP transmission/reception point
  • a base station can accommodate one or more (for example, three) cells.
  • a base station accommodates a plurality of cells
  • the entire coverage area of the base station can be partitioned into a plurality of smaller areas, and each smaller area can provide communication services through base station subsystems (for example, indoor small base stations (Remote Radio Heads (RRHs)).
  • RRHs Remote Radio Heads
  • the term "cell” or “sector” refers to all or part of the coverage area of at least one of a base station and a base station subsystem that provides communication services within this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station may be called a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terms.
  • At least one of a base station or a mobile station may be called a transmission apparatus, a reception apparatus, a radio communication apparatus, and the like.
  • the base station and mobile station may be a device mounted on a moving body, a moving body itself and the like.
  • the moving body may be a transportation (for example, a car, an airplane and so on), an unmanned moving body (for example, a drone, an autonomous car, and so on), or a (manned or unmanned) robot.
  • at least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base stations in the present disclosure may be replaced with the user terminal.
  • each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between the base station and the user terminal is replaced with communication among a plurality of user terminals (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), and so on).
  • the user terminal 20 may be configured to have the functions of the base station 10 described above.
  • the wording such as "up” and “down” may be replaced with the wording corresponding to the terminal-to-terminal communication (for example, "side”).
  • an uplink channel, a downlink channel, and so on may be replaced with a side channel.
  • the user terminal in the present disclosure may be replaced with a base station.
  • a configuration in which the base station 10 has the function of the above-described user terminal 20 may be employed.
  • base stations may, in some cases, be performed by their upper nodes.
  • various operations that are performed so as to communicate with terminals can be performed by base stations, one or more network nodes (for example, mobility management entities (MMEs), serving-gateways (S-GWs), and the like are conceivable, but these are not limiting) other than base stations, or combinations of these.
  • MMEs mobility management entities
  • S-GWs serving-gateways
  • aspects/embodiments described in the present disclosure may be used individually or in combinations, which may be switched depending on the mode of implementation. Furthermore, the order of processing, sequences, flowcharts, and so on that have been used to describe the aspects/embodiments in the present disclosure may be re-ordered as long as inconsistencies do not arise. For example, regarding the methods described in the present disclosure, elements of various steps are presented using an illustrative order, and are not limited to the presented particular order.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New Radio Access Technology New-RAT
  • New Radio NR
  • New radio access NX
  • Future generation radio access FX
  • GSM Global System for Mobile communications
  • a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G, and the like).
  • references to an element using a designation such as “first”, “second”, or the like as used in the present disclosure does not generally limit the amount or order of these elements. These designations can be used in the present disclosure, as a convenient way of distinguishing between two or more elements. Thus, references to first and second elements do not mean that only the two elements can be employed, or that the first element must precede the second element in some form.
  • judging (determining) may encompass a wide variety of actions. For example, “judging (determining)” may be interpreted to mean making judgements and determinations related to judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (for example, looking up in a table, database, or another data structure), ascertaining, and so on.
  • judge determination
  • transmitting for example, transmitting information
  • accessing for example, accessing data in a memory
  • judge (determine) as used herein may be interpreted to mean making “judgements and determinations” related to resolving, selecting, choosing, establishing, comparing, and so on.
  • judge (determine) as used herein may be interpreted to mean making "judgements and determinations” related to some action.
  • maximum transmission power may mean the maximum value of transmission power, the nominal UE maximum transmit (transmission) power, or the rated UE maximum transmit (transmission) power.
  • connection means all direct or indirect connections or coupling between two or more elements, and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination of these. For example, "connection” may be replaced by "access”.
  • these elements when two elements are connected, these elements can be considered “connected” or “coupled” to each other by using one or more electrical wires, cables, printed electrical connections, and the like, and, as some non-limiting and non-inclusive examples, by using electromagnetic energy having wavelengths in the radio frequency, microwave, and optical (both visible and invisible) domains.
  • the phrase "A and B are different” may mean “A and B are different from each other”. Note that the term may mean that “A and B are each different from C”.
  • the terms such as “leave”, “coupled”, and the like may be interpreted as “different”.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
EP18935523.3A 2018-09-28 2018-09-28 Équipement utilisateur, et station de base Pending EP3860067A4 (fr)

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PCT/JP2018/036569 WO2020066013A1 (fr) 2018-09-28 2018-09-28 Équipement utilisateur, et station de base

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EP (1) EP3860067A4 (fr)
JP (1) JP7197600B2 (fr)
CN (1) CN113169946B (fr)
BR (1) BR112021005866A2 (fr)
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US11991711B2 (en) 2018-10-10 2024-05-21 Ntt Docomo, Inc. Terminal and radio communication method

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EP3860067A4 (fr) 2022-05-18
JP7197600B2 (ja) 2022-12-27
CN113169946A (zh) 2021-07-23
JPWO2020066013A1 (ja) 2021-09-24
WO2020066013A1 (fr) 2020-04-02
CN113169946B (zh) 2024-03-12
CA3114569A1 (fr) 2020-04-02
BR112021005866A2 (pt) 2021-07-27
US20210360665A1 (en) 2021-11-18

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